CVE-2016-1602 in Linux Enterprise Desktop
Summary
by MITRE
A code injection in the supportconfig data collection tool in supportutils in SUSE Linux Enterprise Server 12 and 12-SP1 and SUSE Linux Enterprise Desktop 12 and 12-SP1 could be used by local attackers to execute code as the user running supportconfig (usually root).
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Analysis
by VulDB Data Team • 09/11/2020
The vulnerability identified as CVE-2016-1602 represents a critical code injection flaw within the supportconfig data collection utility of SUSE Linux Enterprise Server and Desktop versions 12 and 12-SP1. This issue resides in the supportutils package which is designed to gather system diagnostic information for support purposes. The flaw allows local attackers to inject malicious code that will execute with the privileges of the user running supportconfig, typically root, thereby creating a severe privilege escalation vector. The vulnerability stems from inadequate input validation and sanitization within the data collection tool's processing logic, creating an environment where attacker-controlled data can be interpreted as executable code rather than benign input.
The technical implementation of this vulnerability involves the improper handling of command-line arguments and configuration data within the supportconfig utility. When the tool processes certain input parameters or configuration files, it fails to properly sanitize or validate the data before incorporating it into system commands or execution contexts. This behavior aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and represents a classic example of how insufficient input validation can lead to arbitrary code execution. The flaw essentially allows an attacker to manipulate the tool's execution flow by injecting malicious payloads that bypass normal security controls, enabling code execution with elevated privileges.
From an operational perspective, this vulnerability presents a significant risk to SUSE Linux Enterprise environments as it requires only local access to exploit successfully. Attackers with basic user privileges can leverage this weakness to gain root access, potentially compromising entire systems and their data integrity. The impact extends beyond individual system compromise to include potential lateral movement within network environments, especially in enterprise settings where supportconfig might be used regularly for system diagnostics and monitoring. The vulnerability affects both server and desktop editions, making it particularly concerning for organizations that deploy these operating systems across their infrastructure. According to ATT&CK framework category T1059, "Command and Scripting Interpreter," this vulnerability enables adversaries to execute commands with elevated privileges, while T1068, "Exploitation for Privilege Escalation," directly applies to the privilege escalation aspect of the flaw.
Mitigation strategies for CVE-2016-1602 should prioritize immediate patching of affected systems through official SUSE security updates, which would address the input validation issues in supportconfig. Organizations should also implement restrictive file permissions on the supportutils package and its associated binaries to limit local access to privileged operations. Network segmentation and monitoring of supportconfig usage can help detect potential exploitation attempts, while regular security audits should verify that no unauthorized modifications have been made to the support tools. System administrators should consider disabling unnecessary supportconfig functionality or restricting its execution to trusted users only. The remediation process should also include verifying that all supportutils components are properly updated and that no outdated versions remain accessible to local users. Additionally, implementing principle of least privilege controls for user accounts and monitoring for unusual command execution patterns can help detect and prevent exploitation attempts, while maintaining comprehensive logging of supportconfig activities for forensic analysis purposes.